Question

X 4. If *+ = -1, where x # 0 and y = 0, then the value (x3-y3) is a) 1 b)-1 c)0 d) 2​

Answer 1

Answer:

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Answer 2

Answer:

if yy + xy

=−1

simplifies to x

2 +xy+y 2

=0as (x 3 −y 3)

=(x−y)(x 2 +xy+y 2)

=0 using above result